RS 38 or RS36

[Kraptanaman]

I am going to buy a new set of RS36 but i have been offered a good set of RS38 for a bargain price.  Will they suit a gsx1170 with gas flowed head or are they too big?

[Gixer1460]

IMO if the engine is producing 130+hp they may be of some benefit although bottom end might be 'over carb'd', but add set of cams later and they'll be happier. As a GSX isn't a high rpm motor the increase in high end airflow isn't so much use as it would be on a GSXR.